Tasel

TDA7294, monolithic IC with output up to 100W as main core for this useful audio amplifier. This circuit is a mono for a single channel in 4Ω or 8Ω load. Simple audio class A-B amplifier. Read more »

Based on three characteristics: good quality sound, easy to make, and not expensive circuit, this TOSHIBA DX is worth to try. Just need 36VDC voltage input as a fuel, the circuit can produce 100W output on 40 Ohm speaker or 50W on 80 Ohm, using a pair of TOSHIBA A1943 – C5200 per channel. Read more »

This inverter circuit is very useful for low load application such as emergency light, radio, or DVD player. With transistors as main active component, please take more attention when you assemble this 100 W inverter circuit.
Power source of this circuit just 12V DC, but can produce about 100W at 220V AC with simple assembling and not need a lot of parts. Read more »

This 400 W MOSFET Audio Amplifier using IRFP448 circuit is simple project. With low noise and distortion, but powerful. As the fuel, this project consume 70-80 Vdc and 5 A fuse as the protector for short circuit. Read more »

The circuit of this 30W audio amplifier produce a clear audio output quality. The circuit module doesn’t have any improvement. With Darlington pair in transistor TIP141 and TIP146. This transistor need heat-sink or better temperature. Read more »

Power amplifier settled on HEXFET IRF9540 and IRF540 which probably produce 65 W at the output. This circuit is simple and have a good audio quality. For thermal static, use heatsink on Q8, Q10, Q11, Q12, and Q13. Read more »

Mini stereo audio amplifier with low distortion. Take about 10% distortion on 4 Ohm – 8 Ohm loudspeaker. The LM4756 can delivers 7W power output. This small audio amplifier also featured quiet fade-in/out mute function, stereo variable line-out pins, AC output short circuit protection, and thermal shutdown protection. Read more »

With 4 pairs of 2SC5200 and 2SA1943, this circuit can produce about 500W. Voltage input as the fuel is +/- 65V. And for best result, you must use heatsink and fan. This circuit also feature circuit protection using fuse. Read more »

Here is a portable headphone amplifier for your music player. This circuit improve the gadget audio outputs with low noise and distortion, as well as a long battery life. With an external amplifier, the headphone driver in the music player is no longer required to supply high currents into a low impedance. Read more »

Conventional power amplifier with high-pass and low-pass filter. Supplied 60V DC, this circuit can produce about 300W sound power. Opamp NE5534 is arranged as a differential amplifier, output of NE5534 is applied to drive stages MJE340 and MJE350 via R6 from pin 6. The output amplifier proper consists of drive stages MJE1530 and MJE1531 and power transistors pairs of MJ15003 and pairs of MJ15004, which have been arranged as symmetrical power darlingtons. Read more »